And chaeles platt



(NoModeL) I. BIHL 81: 0. PLATT.

SEWING MACHINE TAKE-UP. No. 349,029. Patented Sept. 14, 1886.

FIG-.1. A FIGJZ.

N. Finns. PhotoLmlographer, Wnhinglon, n, c

, UNITED STATES PATENT OFFICE.

IGNACE BIHL, OF NEWPORT, KENTUCKY, AND CHARLES PLATT, OF CINCIN- OHIO.

SEWING MACHINE TAKE-UP.

SPECIFICATION forming part of Letters Patent No. 349,029, dated September 14, 1886.

Application filed February 25, 1886., Serial No. 193,120. (No model.)

To all whom it may concern.-

Be it known that we, IGNAOE BIH a citizen of the German Empire, residing at Newport, in the county of Campbell and State of Kentucky, and CHARLES PLATT, a citizen of the United States, residing at Cincinnati, in

the county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Sewing-Machine Take-Ups, of which the TO following is a specification, reference being had therein to the accompanying drawings.

Our invention comprises a novel combination of devices whereby the simple elevation of the pressure-bar lifter of a sewing-machine I5 acts successively to open the tension to uncouple the take-up lever from the driving-cam,

and, finally, to raise the free end of this lever to its highest point, for the purpose of pre-I similar elevation, but showing said lifterswung.

up. Fig. 3 is a front elevation of a portion of the machinehead, the presser-bar lifter being shown in the same position as in Fig. 1.

Fig. 4 is an enlarged front elevation of the mortised and notched eanrplate that receives the pivoted end of the take-up lever. Fig. 5

is a sectionized side elevation of said camplate. Fig. 6 is a side elevation of the pivoted 0 end of the take-up lever. Fig. 7 is a horizontal section through the eyes and notches'of the connected cam-plate and take-up lever, the pivot that unites said members being omitted. Fig. Sis a front elevation oft-hecoupling-latch and a portion of thecam-plate and take-up lever, the latch-spring being omitted.

A represents a portion of the head, and B the cap, of any form of sewingmachine, said head having journaled in it a driving-shaft, O, carrying a cam, D, which latter actuates the needle-bar in the usual manner, although in the present case said cam is simplyshown as being grooved at (Z, to admit a roller, E, journaled on astud, c. This stud projects inwardly from a cam-plate composed of a pair of checks, F F, separated by a mortise, G, having a sloping base, 9, said cheeks being provided with eyes f f, to receive the pivotscrew H, upon which said plate vibrates. Furthermore, these cheeks are notched at I l, for a purpose that will presently appear. Adapted to play within the mortise G is the tenon end J of a take-up lever, K, said tenon having an inclinedbearing, j, adapted to rest upon the sloping base g of said mortise. This tenon has a notch, i, which is in line with the notches I I of the cam-plate, and an eye, 9', coincident with the eyes f f of said plate, as seen in Fig. 7. Projecting upwardly from said tenon is a lug, L, traversed by a pivot, Z, upon which latter is hung a latch, M, having atooth, an, adapted to engage with the notches I I c, said latch being maintained in its normal position by a spring, N, whose fixed end is attached to said lug L.

The latch M has a forwardlyprojecting branch, 0, (more clearly seen in Fig. 8,)which branch terminates with a rounded end, 0, adapted to be operated by the curved end 1) of a switch, P, the latter being pivoted to the head at a,- and having a notch, 12, near its heel.

Pivoted to the head of the machine at q is a presser-bar lifter, Q, provided with two wedges or inclined lugs, R S, the former of which is adapted to operate the switch ]?,while the latter actuates the push-piece t of a tension, T. This tension may be of any approved construction, but we prefer using the device seen in the patent granted to Ignace Bih], September 16, 1884, No. 305,273.

In applying our improvements to a sewingmachine the tenon end J of take-up lever K is inserted in the mortise G of cam-plates F F, the inclined bearingj of said tenon resting on the sloping base 9 of said mortise. The pivot H is then passed through the coincident eyes, f f j, and screwed homein the machinehead, thus causing the roller E to occupy the groove 11 of 0am D in the usual manner. In this normal position of the various parts the I00 spring N causes the tooth in to snap into the notches I I i of the cheeks F F and tenon J, thereby coupling the take-up lever to the camplate.

The switch P is hung upon its pivot a, and theupperorhcavierend, p, of said switch causes its notched heel to bear against the prcsserbar lifter Q, which latter is normally turned down, as seen in .Figs. 1 and 3. Now, as long as said lifter Q remains in this position the take-up lever K will operatein the usual manner, because it is coupled to the cam-plates F F by the tooth on, and said plates vibrate as a unit upon the pivot II; but when themachine is stopped the free end of lifter Q is swung up, and by the time it reaches the po sition indicated by the dotted lines Q in Fig. 3, the wedges R S will have performed their duty. These devices are preferably arranged so as to cause the wedge S to act slightly in advance of the wedge R, in order that the tension T may be opened before the switch I is moved, this opening of the tension being ell'ected by the contact of said wedge S with the push-pin tor its equivalent. The mo ment the other wedge, It, enters the notch 11 of switch P, the latter swings on the pivot a and causes its curved end p to strike against the free end of latch M, and thereby disengage its tooth in from the coincident notches I Ii, as seen in Fig. 2. Consequently the take-up lever K is now uncoupled from the cam-plates F F, and is capable of being operated independently of the latter. Vhen the presser-bar lifter Q has completed its up ward swing and has reached the position indicated by the dotted lines Q in Fig. 3, the wedge It will have exerted its full power against the switch, and the latter will then be thrown over to the position indicated by the dotted lines in Fig. 2.

Reference to Fig. 6 shows that when the tooth on is disengaged from the notch '1 the upper end of latch llI bears against the edge of lug L. lhereiore the pressure oi switch P against this latch throws the take-up lever K up to its most elevated position, as indicated by the dotted lines K in Fig. 2. The takenp lever is now uncoupled from cam-plates F F, and although the latter are free to vibrate with every revolution of the driving-cam D (Z, said lever K will remain perfectly stationary. From this description it is apparent that the simple elevation of the presser-bar lifter Q opens the tension, and then renders the takeup lever inoperative for the time being, no matter what position the needle may be in when said lifter is raised. It is also evident that this elevation of the take up lever enables the thread to be cut oil quite close to the needle, and without danger of the thread being pulled out of the same at the next stroke of the machine; but the instant the lifter is turned down, preparatory to starting the machine, the switch P falls back to the position seen in Fig. 1, thereby permitting the take-up lever to drop, and causing the tooth m of the latch to re-cngage with the coincident notches, I 1 1'. The take up lever being thus again coupled to the cam-plates, said lever operates in the same manner as in ordinary sewing-ma chines.

\Ve claim as our invention 1. The combination, in a sewing-machine, of a tension mechanism, a cam operating a vibrating cam-plate, a take-up lever coupled to said plate, and a device for uncoupling said lever after said tension mechanism has been opened, substantially as herein described.

2. The combination, in a sewing-machine, of a tension mechanism, a cam operating a vibrating cam-plate, a take-up lever coupled to said plate by a spring-coiniection, and a device l'or disengaging said spring-connection after said tension mechanism has been opened, substantially as herein described.

3. The combination, in a sewing-machine, of a tension mechanism, a cam operating a vibrating cam-plate, a take-up lever coupled to said plate by a spring-connection, and a pivoted switch that disengages said springconnection after said tension mechanism has been opened,substanti ally as herein described.

.4. The combination, in a sewing-machine, of a tension mechanism, a cam operating a vibrating cam-plate, a take-up lever coupled to said plate by a spring-connection, and a pivoted switch that disengages said springeonncction, which switch is actuated by the presscr-bar lifter after the latter has opened said tension mechanism, substantially as herein described.

5. The combination, in ascwing-niachine. of the notched and mortised cam-plates Ff I F I G g, tcnoncd and notched take-up lever J j t K, latch M, tooth m, spring N, piv oted switch 1 p, presser-bar lifter Q, wedges R S, and tension device T, said cam-plates be ing operated by the driving-cam, substantially as herein described.

6. In combination with the notched and mortised cam-plates F f I F l. G tenoned and notched take-up lever Jj 1 K, latch M, tooth m, and spring N, adapted to operate as herein described, the lug L, projecting from the tenon J, and having one end of the latch in contact with it, for the purpose specified.

In testimony whereof we aflix our signatures in presence of two witnesses.

' IGNACE BillL.

CHARLES PLATI.

Witnesses:

James H. LAYMAN, SAML. S. CARPENTER.

IIO 

